package com.cy.pj.sys.service;

import com.cy.pj.common.annotation.RequiredCache;
import com.cy.pj.common.annotation.RequiredLog;
import com.cy.pj.common.exception.ServiceException;
import com.cy.pj.common.vo.Node;
import com.cy.pj.sys.entity.SysMenu;
import com.cy.pj.sys.entity.SysUser;
import com.cy.pj.sys.mapper.SysMenuMapper;
import com.cy.pj.sys.mapper.SysRoleMenuMapper;
import org.apache.shiro.SecurityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.util.List;
import java.util.Map;

@Service
public class SysMenuServiceImpl implements SysMenuService {
    @Autowired
    private SysMenuMapper sysMenuMapper;
    @Autowired
    private SysRoleMenuMapper sysRoleMenuMapper;

    @Override
    public List<Map<String, Object>> findObjects() {
        List<Map<String, Object>> list = sysMenuMapper.findObjects();
        if (list == null || list.size() == 0)
            throw new ServiceException("没有对应的菜单信息");
        return list;
    }

    @RequiredLog(operation = "删除菜单")
    @Override
    @Transactional
    public int deleteObject(Integer id) {
        //1.验证数据的合法性
        if (id == null || id < 0)
            throw new IllegalArgumentException("请先选择");
        //2.基于id进行子元素查询
        int count = sysMenuMapper.getChildCount(id);
        if (count > 0)
            throw new ServiceException("请先删除子菜单");
        //3.删除角色,菜单关系数据
        sysRoleMenuMapper.deleteObjectsByMenuId(id);
        //4.删除菜单元素
        int rows = sysMenuMapper.deleteObject(id);
        if (rows == 0)
            throw new ServiceException("此菜单可能已经不存在");
        return rows;
    }


    @Override
    public List<Node> findZTreeMenuNodes() {
        return sysMenuMapper.findZTreeMenuNodes();
    }

    @RequiredLog(operation = "新增菜单")
    @Override
    public int saveObject(SysMenu entity) {
        //1.合法验证
        if (entity == null)
            throw new ServiceException("保存对象不能为空");
        if (StringUtils.isEmpty(entity.getName()))
            throw new ServiceException("菜单名不能为空");
        int rows;
        SysUser user = (SysUser) SecurityUtils.getSubject().getPrincipal();
        entity.setCreatedUser(user.getUsername()).setModifiedUser(user.getUsername());
        try {
            rows = sysMenuMapper.insertObject(entity);
        } catch (Exception e) {
            e.printStackTrace();
            throw new ServiceException("保存失败");
        }
        return rows;
    }

    @RequiredLog(operation = "修改菜单")
    @Override
    public int updateObject(SysMenu entity) {
        //1.合法验证
        if (entity == null)
            throw new ServiceException("保存对象不能为空");
        if (StringUtils.isEmpty(entity.getName()))
            throw new ServiceException("菜单名不能为空");
        //2.更新数据
        SysUser user = (SysUser) SecurityUtils.getSubject().getPrincipal();
        entity.setModifiedUser(user.getUsername());
        int rows = sysMenuMapper.updateObject(entity);
        if (rows == 0)
            throw new ServiceException("记录可能已经不存在");
        //3.返回数据
        return rows;
    }
}
